分组判别图 Combined-groups plots
多组判别分析 Multiple Group Discriminant Analysis
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系统模型用该方法分析油液中各元素的浓度关联度，从而判别发动机的工况和元素分组。
The system model, analyzes relational value of concentration of various elements in oil, which is used to conclude engine condition and elemental grouping.
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